Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
  • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
  • B25F5/02—Construction of casings, bodies or handles
  • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
  • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S81/00—Tools
  • Y10S81/12—Power hammer

Definitions

• the invention relates to a handle for a hammer drill and / or chisel hammer and a drill hammer and / or chisel hammer equipped with the handle.
• radial handles which can be fixed by means of a clamp encompassing the tool axis and fastened to the hammer housing by the operator in any radial position relative to the tool axis defined by the longitudinal axis of the drill.
• a so-called spade handle has proven itself, which can be pivoted about the chisel axis and can additionally be tilted towards or away from the chisel in certain locking positions about an axis perpendicular to the chisel axis.
• a similar handle is known from DE 32 29 183 C2.
• DE-AS 1 427 734 describes an impact drill in which a radial handle is screwed into the housing of the drill.
• combination hammers i.e. Hammers that are suitable for both drilling and chiseling are usually only available with one handle variant that is suitable for one application and that is less suitable for the other application. So if the operator wants to switch between chiseling and drilling, it is often necessary to swap out the handles. A quick change of the current gripping position is only possible by converting or adjusting the respective handle.
• the invention is based on the object of specifying a universal handle which is equally suitable for drilling and chiseling and which offers the operator several ergonomically sensible gripping positions with little or no adjustment effort.
• a handle for a rotary and / or chisel hammer is specified, with a holder; a radial handle which can be attached to the holder or directly to the hammer, the handle axis of which is arranged essentially radially to a tool axis defined by the position of a tool received by the hammer; and with a tangential handle attachable to the bracket, having a first handle portion whose handle axis is substantially perpendicular and spaced from the tool axis, and a second handle portion whose handle axis is substantially perpendicular and spaced from the tool axis and substantially perpendicular to the handle axis of the first handle section.
• a radial handle for drilling and a tangential handle for chiseling By providing two types of handles according to the invention, namely a radial handle for drilling and a tangential handle for chiseling, it is possible to switch between the different working methods without having to change the handle accordingly.
• the particularly advantageous embodiment of the tangential handle namely the division into a first and a second handle section perpendicular thereto, enables the operator to guide the hammer very comfortably and safely, particularly when chiseling.
• the handle arrangement according to the invention ensures that all handle elements are located only in one quadrant of a plane perpendicular to the tool axis. As a result, the other three quadrants of the plane are kept clear of the handle system, so that drilling or chiseling is also possible close to walls or in corners.
• the three handle sections offer three gripping options for optimal support of the moments that occur during work.
• the tangential handle is designed so that the handle sections are open at the top so that the hand can be quickly released from the handle at any time. B. with unexpected blockage of the drill - a sticking of the hand is avoided.
• the radial handle is releasably attached to the holder, the releasability not affecting the attachment of the tangential handle. This makes it possible to quickly remove the radial handle from the holder and, for example, - 3 -
• the tangential handle is fastened to the holder so as to be pivotable about an axis perpendicular to the tool axis. This ensures that the tangential handle can be swiveled vertically downwards, away from the chisel, for example for setting the chisel in the direction of the chisel or for drilling or chiseling, in order to offer the operator a favorable grip option.
• the pivoting of the tangential handle is possible without affecting the attachment of the radial handle.
• a locking element for locking the tangential handle on the holder is advantageously provided, with locking means also ensuring a positive positioning of the tangential handle relative to the holder and thus a secure connection between the tangential handle and the holder during operation.
• Fig. 1 shows a hammer in side view with the invention
• Fig. 2 is a front view of the hammer with the handle, seen from the left in Fig. 1;
• FIG. 3 shows a partial section of the handle from FIG. 1.
• a hammer 1 serving as a hammer drill and chisel which has a main handle 2 in its rear region, on which the on / off switch is also located in the usual way.
• a holder 4 is placed in a manner known per se.
• the hammer housing 3 usually receives the transmission in this area and can be made of plastic or metal.
• the holder 4 is pushed onto the hammer housing 3 in the direction of a tool axis 5 and fixed there at one end by means of a clamping device known per se and serving as a fastening element 4a in an arbitrary angular position relative to the tool axis 5 on the hammer housing 3.
• the bracket 4 should be mounted so that it extends under the hammer housing 3 with its other end. It then carries a tangential handle 6 and a radial handle 7 on its underside.
• the tangential handle 6 has a first handle section 8 and a second handle section 9 which is perpendicular thereto and integrally connected to the first handle section 8.
• the handle axes are drawn in the respective handle sections 8, 9 as dash-dotted lines in FIG. 2.
• the free end 10 of the handle section 9 is widened in a spade shape to enable the operator to grip the tangential handle 6 securely and to prevent the second handle section 9 from accidentally slipping off.
• the hammer-side end 11 of the first grip section 8 is also widened.
• the widening at the end 1 1 on the hammer side furthermore protects the operator from being burned on the hammer housing, which is usually made of metal.
• the operator's hand is also protected against electric shocks, which could otherwise jump over from the hammer housing 3 if an electrical line has been accidentally drilled into.
• the tangential handle 6 is fastened to the holder 4 by a fixing wheel 12 serving as a locking element. As is also shown in FIG. 3, the fixing wheel 12 is screwed into the holder 4 and clamps a flat region 13 of the tangential handle 6 between it and the holder 4. After loosening the fixing wheel 12, the tangential handle 6 can be pivoted about a pin 14 in the direction of the arrows shown in FIG. 1, which pin 14 extends along an axis 15 that perpendicularly intersects the tool axis 5. This makes it possible to pivot the tangential handle 6 in the direction of the tool, not shown, which improves the manageability of the tool. Conversely, the tangential handle 6 can be pivoted backwards, for example when working in hard-to-reach places, in the direction of the main handle 2. - 5 -
• the radial handle 7 is screwed in below the fixing wheel 12 with a threaded pin 17.
• the radial handle 7 can be screwed out of the fixing wheel 12 and instead screwed into a thread 18 provided on the hammer housing 3.
• the handle axis 15 of the radial handle 7 no longer necessarily has to cross the tool axis 5 vertically. In Fig. 2, this position of the radial handle 7 is shown in dashed lines.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Percussive Tools And Related Accessories (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7862964

Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (23)

Citations (5)

Family Cites Families (6)

• 1998
  • 1998-03-30 DE DE19814175A patent/DE19814175C1/de not_active Expired - Fee Related
• 1999
  • 1999-03-26 EP EP99915710A patent/EP1068051B1/de not_active Expired - Lifetime
  • 1999-03-26 DE DE59905650T patent/DE59905650D1/de not_active Expired - Lifetime
  • 1999-03-26 WO PCT/EP1999/002060 patent/WO1999050030A1/de active IP Right Grant
  • 1999-03-26 JP JP2000540976A patent/JP2002509813A/ja active Pending
  • 1999-03-26 ES ES99915710T patent/ES2199568T3/es not_active Expired - Lifetime
  • 1999-03-26 US US09/623,957 patent/US6484361B1/en not_active Expired - Fee Related

Patent Citations (5)

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